Hilary of Poitiers
Catena Aurea · Johannesevangelium 14
Philip saith unto him, Lord, shew us the Father, and it sufficeth us. Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father? Believest thou not that I am in the Father, and the Father in me? the words that I speak unto you I speak not of myself: but the Father that dwelleth in me, he doeth the works. Believe me that I am in the Father, and the Father in me: or else believe me for the very works’ sake.
(vii. de Trin) For what excuse was there for ignorance of the Father, or what necessity to shew Him, when the Father was seen in the Son by His essential nature2, while by the identity of unity, the Begotten and the Begetter are one: Believest thou not that I am in the Father and the Father in Me?